Normalized 150 MHz differential source counts in the three LoTSS Deep Fields, as derived from final catalogs (filled squares), together with their best fit (gray solid line). They are compared to counts derived from higher frequencies surveys (see legend), and rescaled to 150 MHz by assuming α = − 0.7. Error bars correspond to the quadratic sum of Poisson and systematic errors. Also shown are the Wilman et al. (2008), Bonaldi et al. (2019) and Mancuso et al. (2017) 150 MHz models. The counts are derived by using total flux densities for both point and extended sources.